diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/dl-machine.h')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/dl-machine.h | 175 |
1 files changed, 166 insertions, 9 deletions
diff --git a/sysdeps/powerpc/powerpc32/dl-machine.h b/sysdeps/powerpc/powerpc32/dl-machine.h index de3b9e923a..a8c1e3e490 100644 --- a/sysdeps/powerpc/powerpc32/dl-machine.h +++ b/sysdeps/powerpc/powerpc32/dl-machine.h @@ -1,5 +1,5 @@ /* Machine-dependent ELF dynamic relocation inline functions. PowerPC version. - Copyright (C) 1995-2002, 2003, 2005 Free Software Foundation, Inc. + Copyright (C) 1995-2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -100,6 +100,160 @@ elf_machine_load_address (void) /* The PLT uses Elf32_Rela relocs. */ #define elf_machine_relplt elf_machine_rela +/* This code is used in dl-runtime.c to call the `fixup' function + and then redirect to the address it returns. It is called + from code built in the PLT by elf_machine_runtime_setup. */ +#if !defined PROF +#define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\n\ + .section \".text\" \n\ + .align 2 \n\ + .globl _dl_runtime_resolve \n\ + .type _dl_runtime_resolve,@function \n\ +_dl_runtime_resolve: \n\ + # We need to save the registers used to pass parameters, and register 0,\n\ + # which is used by _mcount; the registers are saved in a stack frame.\n\ + stwu 1,-64(1) \n\ + stw 0,12(1) \n\ + stw 3,16(1) \n\ + stw 4,20(1) \n\ + # The code that calls this has put parameters for `fixup' in r12 and r11.\n\ + mr 3,12 \n\ + stw 5,24(1) \n\ + mr 4,11 \n\ + stw 6,28(1) \n\ + mflr 0 \n\ + # We also need to save some of the condition register fields.\n\ + stw 7,32(1) \n\ + stw 0,48(1) \n\ + stw 8,36(1) \n\ + mfcr 0 \n\ + stw 9,40(1) \n\ + stw 10,44(1) \n\ + stw 0,8(1) \n\ + bl fixup@local \n\ + # 'fixup' returns the address we want to branch to.\n\ + mtctr 3 \n\ + # Put the registers back...\n\ + lwz 0,48(1) \n\ + lwz 10,44(1) \n\ + lwz 9,40(1) \n\ + mtlr 0 \n\ + lwz 8,36(1) \n\ + lwz 0,8(1) \n\ + lwz 7,32(1) \n\ + lwz 6,28(1) \n\ + mtcrf 0xFF,0 \n\ + lwz 5,24(1) \n\ + lwz 4,20(1) \n\ + lwz 3,16(1) \n\ + lwz 0,12(1) \n\ + # ...unwind the stack frame, and jump to the PLT entry we updated.\n\ + addi 1,1,64 \n\ + bctr \n\ + .size _dl_runtime_resolve,.-_dl_runtime_resolve \n\ + \n\ + .align 2 \n\ + .globl _dl_prof_resolve \n\ + .type _dl_prof_resolve,@function \n\ +_dl_prof_resolve: \n\ + # We need to save the registers used to pass parameters, and register 0,\n\ + # which is used by _mcount; the registers are saved in a stack frame.\n\ + stwu 1,-64(1) \n\ + stw 0,12(1) \n\ + stw 3,16(1) \n\ + stw 4,20(1) \n\ + # The code that calls this has put parameters for `fixup' in r12 and r11.\n\ + mr 3,12 \n\ + stw 5,24(1) \n\ + mr 4,11 \n\ + stw 6,28(1) \n\ + mflr 5 \n\ + # We also need to save some of the condition register fields.\n\ + stw 7,32(1) \n\ + stw 5,48(1) \n\ + stw 8,36(1) \n\ + mfcr 0 \n\ + stw 9,40(1) \n\ + stw 10,44(1) \n\ + stw 0,8(1) \n\ + bl profile_fixup@local \n\ + # 'fixup' returns the address we want to branch to.\n\ + mtctr 3 \n\ + # Put the registers back...\n\ + lwz 0,48(1) \n\ + lwz 10,44(1) \n\ + lwz 9,40(1) \n\ + mtlr 0 \n\ + lwz 8,36(1) \n\ + lwz 0,8(1) \n\ + lwz 7,32(1) \n\ + lwz 6,28(1) \n\ + mtcrf 0xFF,0 \n\ + lwz 5,24(1) \n\ + lwz 4,20(1) \n\ + lwz 3,16(1) \n\ + lwz 0,12(1) \n\ + # ...unwind the stack frame, and jump to the PLT entry we updated.\n\ + addi 1,1,64 \n\ + bctr \n\ + .size _dl_prof_resolve,.-_dl_prof_resolve \n\ + # Undo '.section text'.\n\ + .previous \n\ +"); +#else +# define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\n\ + .section \".text\" \n\ + .align 2 \n\ + .globl _dl_runtime_resolve \n\ + .globl _dl_prof_resolve \n\ + .type _dl_runtime_resolve,@function \n\ + .type _dl_prof_resolve,@function \n\ +_dl_runtime_resolve: \n\ +_dl_prof_resolve: \n\ + # We need to save the registers used to pass parameters, and register 0,\n\ + # which is used by _mcount; the registers are saved in a stack frame.\n\ + stwu 1,-64(1) \n\ + stw 0,12(1) \n\ + stw 3,16(1) \n\ + stw 4,20(1) \n\ + # The code that calls this has put parameters for `fixup' in r12 and r11.\n\ + mr 3,12 \n\ + stw 5,24(1) \n\ + mr 4,11 \n\ + stw 6,28(1) \n\ + mflr 0 \n\ + # We also need to save some of the condition register fields.\n\ + stw 7,32(1) \n\ + stw 0,48(1) \n\ + stw 8,36(1) \n\ + mfcr 0 \n\ + stw 9,40(1) \n\ + stw 10,44(1) \n\ + stw 0,8(1) \n\ + bl fixup@local \n\ + # 'fixup' returns the address we want to branch to.\n\ + mtctr 3 \n\ + # Put the registers back...\n\ + lwz 0,48(1) \n\ + lwz 10,44(1) \n\ + lwz 9,40(1) \n\ + mtlr 0 \n\ + lwz 8,36(1) \n\ + lwz 0,8(1) \n\ + lwz 7,32(1) \n\ + lwz 6,28(1) \n\ + mtcrf 0xFF,0 \n\ + lwz 5,24(1) \n\ + lwz 4,20(1) \n\ + lwz 3,16(1) \n\ + lwz 0,12(1) \n\ + # ...unwind the stack frame, and jump to the PLT entry we updated.\n\ + addi 1,1,64 \n\ + bctr \n\ + .size _dl_runtime_resolve,.-_dl_runtime_resolve \n\ +"); +#endif + /* Mask identifying addresses reserved for the user program, where the dynamic linker should not map anything. */ #define ELF_MACHINE_USER_ADDRESS_MASK 0xf0000000UL @@ -174,14 +328,9 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc, return value + reloc->r_addend; } - -/* Names of the architecture-specific auditing callback functions. */ -#define ARCH_LA_PLTENTER ppc32_gnu_pltenter -#define ARCH_LA_PLTEXIT ppc32_gnu_pltexit - #endif /* dl_machine_h */ -#ifdef RESOLVE_MAP +#ifdef RESOLVE /* Do the actual processing of a reloc, once its target address has been determined. */ @@ -232,8 +381,16 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, value = map->l_addr; else { +# if defined USE_TLS && !defined RTLD_BOOTSTRAP sym_map = RESOLVE_MAP (&sym, version, r_type); - value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value; + value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value; +# else + value = RESOLVE (&sym, version, r_type); +# ifndef RTLD_BOOTSTRAP + if (sym != NULL) +# endif + value += sym->st_value; +# endif } value += reloc->r_addend; #else @@ -317,4 +474,4 @@ elf_machine_lazy_rel (struct link_map *map, DT_RELA table. */ #define ELF_MACHINE_PLTREL_OVERLAP 1 -#endif /* RESOLVE_MAP */ +#endif /* RESOLVE */ |